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Great Unconformity and Colorado River, Arizona
Precambrian-Cambrian Unconformity, Grand Canyon, Arizona. (SrU-06)
Download ImageAngular Unconformity at Siccar Point, Scotland
Steeply dipping lower Silurian rock overlain by gently dipping Upper Devonian Old Red Sandstone, described by James Hutton in 1788. (Image ID# SrU-01)
Download ImageAngular Unconformity, Washington (vertical)
Steeply dipping and overturned Miocene Hoh Assemblage overlain by Quaternary gravel. Beach 4, Olympic National Park coastline. (SrU-04)
Download ImageGreat unconformity, Grand Canyon, Arizona
Great unconformity –a nonconformity in this photo. Sequence of Cambrian sandstone (the ledge across the middle of the photo), shale (the overlying slopes) and limestone (the upper cliffs) deposited on top the Vishnu Schist in the Grand Canyon, Arizona. (Image ID# SrU-02)
Download ImageMelange, California
Outcrop of Franciscan melange, near San Simeon, California (SrF-67)
Download ImageGreat unconformity, Grand Canyon (vertical)
Aerial view of nonconformity: Precambrian-Cambrian Unconformity, Grand Canyon National Park, Arizona (SrU-03)
Download ImageDetachement fault, Washington
Detachment fault. Rock above and below deformed independently
of each other (SrF-68)
Melange, Oregon
Melange of mudstone with broken fragments of sandstone and chert. (SrF-77).
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Brecciated limestone. Death Valley, CA.
Brecciated limestone in Titus Canyon (not in a fault zone). Death Valley National Park, California. (SrF-65)
Download Imagepseudotachylite injection into gneiss
pseudotachylite injection into gneiss, Arizona.
(SrF-61)
Brecciated pegmatite
Brecciated pegmatite. Black matrix contains iron oxide. (SrF-62)
Download ImageCalcite fibers on fault surface (vertical).
Growth direction indicates the block in the photo moved to the right and slightly upward. (SrF-59).
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Fault gouge
Color-banded fault gouge along Badwater Turtleback fault, Death Valley, California. Main fault surface is in upper right (SrF-58)
Download Imagecalcite-filled pull-apart (vertical)
Fibrous calcite in rhombic “pull-apart” structure between the two small strike-slip faults in siltstone. (SrF-60)
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Unloading joints in granitic rock (vertical).
Sheeting joints in granodiorite cause exfoliation, southern BC, Canada. (SrF-53)
Download ImageFault gouge along fault surface.
Low-angle fault in limestone. Movement was top-right (SrF-57)
Download Imageslickenlines on fault surface, Colorado
near-vertical slickenlines indicate dip-slip movement. Rocky Mountain National Park, Colorado (SrF-55).
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